U.S. patent number 6,371,787 [Application Number 09/801,320] was granted by the patent office on 2002-04-16 for pull-to-release type latch mechanism for removable small form factor electronic modules.
This patent grant is currently assigned to International Business Machines Corporation. Invention is credited to Scott M. Branch, David P. Gaio, Michael F. Hanley, William K. Hogan.
United States Patent |
6,371,787 |
Branch , et al. |
April 16, 2002 |
Pull-to-release type latch mechanism for removable small form
factor electronic modules
Abstract
A latch mechanism using a natural unlatching, releasing, pull
movement has a slidable latch release which is carried on a device
being latched, such as an electronic module. This slidable latch
release has a pair of recesses or cavities at least partially
defining cams that engage and displace a latch member from
engagement with a latching surface on the device being latched. A
latch release member is provided with a pair of wing members that
are resilient and are deformed as a result of movement of the latch
release relative to the latched device. Deformation provides a bias
to restore the latch release member to a position capable of
permitting latching upon the reinsertion of the device into a host
device, such as a computer or the like.
Inventors: |
Branch; Scott M. (Rochester,
MN), Gaio; David P. (Rochester, MN), Hanley; Michael
F. (Rochester, MN), Hogan; William K. (Rochester,
MN) |
Assignee: |
International Business Machines
Corporation (Armonk, NY)
|
Family
ID: |
25180786 |
Appl.
No.: |
09/801,320 |
Filed: |
March 7, 2001 |
Current U.S.
Class: |
439/352 |
Current CPC
Class: |
H01R
13/6275 (20130101) |
Current International
Class: |
H01R
13/627 (20060101); H01R 006/27 () |
Field of
Search: |
;439/352,353,357,358 |
References Cited
[Referenced By]
U.S. Patent Documents
|
|
|
5564939 |
October 1996 |
Maitani et al. |
5779495 |
July 1998 |
Dechelette et al. |
|
Primary Examiner: Luebke; Renee
Assistant Examiner: Hammond; Briggitte R.
Attorney, Agent or Firm: Letson; Laurence R.
Claims
We claim:
1. A combination of a first body, a second body and a
pull-to-release latch mechanism for latching a first body into a
receiving portion of a second body, comprising:
said first body comprising a device having at least a first surface
and a pair of surfaces defining wall surfaces;
said first surface interrupted by a recess formed into said first
body comprising surfaces of said recess forming a channel, latch
surface and a retention surface;
a slide member disposed within said channel and movable relative to
said first body;
said slide member further constrained within said channel and being
reciprocally displaceable relative to said first body and
comprising at least an extended member resiliently attached to said
slide member and disposed to be deflected by movement of said slide
member, said extended member disposed in all interfering placement
juxtaposed with said retention surface, providing an engagement
between said extended member and said retention surface to retain
said slide member and resiliently restore said slide member to a
retracted position relative to said first body,
said slide member further comprising at least one cavity formed in
an exposed surface thereof, said cavity comprising at least one
surface inclined relative to a direction of movement of said slide
member relative to said first body and creating a progressively
reduced depth of said cavity in a direction opposite to a direction
of withdrawal of said slide member from said first body, and
a displaceable latch member supported by said second body and
projecting into said at least one cavity for disposal in a blocking
relationship with said latching surface, said latch member
engageable by said inclined surface upon movement of said slide
member and said inclined surface in a direction outward from said
second body, and displaceable out of said blocking relation with
said latching surface,
whereby a pulling movement of the slide will act to unlatch and
subsequently extract said first body from said second body.
2. The pull-to-release latch mechanism for latching a first body
into a receiving portion of a second body of claim 1 wherein said
first body is an electronic module and said second body is an
electronic host device.
3. The pull-to-release latch mechanism for latching a first body
into a receiving portion of a second body of claim 2 wherein said
electronic module further comprises retainers disposed adjacent
said channel and engageable with said slide member for retaining
said slide member in said reciprocal displaceability relationship
with said electronic module.
4. The pull-to-release latch mechanism for latching a first body
into a receiving portion of a second body of claim 2 wherein said
extended member comprises a pair of arms resiliently disposed on
said slide member and flexibly deformable by translation of said
slide member in a direction of extraction of said electronic module
from said host device.
5. The pull-to-release latch mechanism for latching a first body
into a receiving portion of a second body of claim 2 wherein said
latch member comprises a displaceable member supported on said host
device.
6. The pull-to-release latch mechanism for latching a first body
into a receiving portion of a second body of claim 5 wherein said
displaceable member is a leaf spring.
7. The pull-to-release latch mechanism for latching a first body
into a receiving portion of a second body of claim 6 wherein said
leaf spring is formed to present a latching portion juxtaposed to
said latching surface of said electronic module.
8. The pull-to-release latch mechanism for latching a first body
into a receiving portion of a second body of claim 7 wherein said
latching portion of said leaf spring is engaged by said inclined
surface and forces said leaf spring to resiliently deform, removing
said latching portion from a blocking position relative to said
latch surface of said electronic module.
9. A combination of a first device, a second device and a
pull-to-release latch mechanism for retaining said first device in
and releasing said first device from said second device with a
pulling motion comprising:
said second device forming a receiving region for receiving said
first device, said first device comprising both a slidable latch
release member extending outwardly from said first device and
graspable by a human as well as a latch surface transverse to
movement of said slidable latch release member;
said latch release member slidable relative to said first device in
a direction substantially parallel to movement of said first device
during insertion and removal of said first device into and from
said second device,
said second device comprising a moveable latch member positionable
juxtaposed to said latch surface and engageable with said latch
surface for preventing removal of said first device from said
second device;
said latch release member comprising at least a recess disposed to
accept at least a portion of said latch member whenever said first
device is fully inserted into said second device, said recess
further forming a cam surface engageable with said latch member
forming a pull-to-release latch mechanism for retaining a first
device in and releasing said first device from a second device with
a pulling motion camming said latch member out of said juxtaposed
position with said latch surface responsive to a pulling on said
latch release member,
thereby releasing said first device from said latch member for
removal of said first device from said second device.
10. The pull-to-release latch mechanism for retaining a first
device in and releasing said first device from a second device with
a pulling motion of claim 9 wherein said latch release member is
resiliently biased to a retracted position with respect to said
first device.
11. The pull-to-release latch mechanism for retaining a first
device in and releasing said first device from a second device with
a pulling motion of claim 10 wherein said latch member comprises a
formed cantilevered beam spring supported by said second device and
deflectable relative thereto.
12. The pull-to-release latch mechanism for retaining a first
device in and releasing said first device from a second device with
a pulling motion of claim 11 wherein said first device is formed to
create a recess therein and said latch release member is formed to
possess a pair of opposingly extending resilient projections
insertable within said recess and moveable to limited degree
therein in response to movement of said latch release member
relative to said first device, providing a resilient restore force
for retracting said latch release member relative to said first
device.
13. The pull-to-release latch mechanism for retaining a first
device in and releasing said first device from a second device with
a pulling motion of claim 12 wherein said first device comprises
deformable retaining members engageable with said latch release
members for accepting insertion of said latch release member into
said first device and retaining said latch release member in
slidable relationship to said first device.
Description
CROSS REFERENCE TO RELATED UNITED STATES PATENT APPLICATIONS
The following are related co-pending United States patent
applications:
REMOVABLE SMALL FORM FACTOR FIBER OPTIC TRANSCEIVER MODULE CHASSIS,
Ser. No. 09/489,870, filed Jan. 20, 2000, by Scott M. Branch, David
P. Gaio and William K. Hogan;
REMOVABLE LATCH AND BEZEL ELECTRO-MAGNETIC INTERFERENCE GROUNDING
FEATURE FOR FIBER-OPTIC TRANSCEIVERS, Ser. No. 09/410,786, filed
Oct. 1, 1999, by Scott M. Branch, David P. Gaio and William K.
Hogan;
REMOVABLE SMALL FORM FACTOR FIBER OPTIC TRANSCEIVER MODULE AND
ELECTROMAGNETIC RADIATION SHIELD, Ser. No. 09/489,184, filed Jan.
20, 2000, by Scott M. Branch, David P. Gaio and William K.
Hogan;
PIVOTING TYPE LATCH FOR REMOVABLE ELECTRONIC DEVICES, Ser. No.
09/591,640, filed Jun. 9, 2000, by Scott M. Branch, Leland L. Day,
David P. Gaio, Michael F. Hanley and William K. Hogan;
PULL TYPE LATCH MECHANISM FOR REMOVABLE SMALL FORM FACTOR
ELECTRONIC MODULES, Ser. No. 09/657,214, filed Sep. 7, 2000, by
Scott M. Branch, David P. Gaio, Michael F. Hanley and William K.
Hogan; and
PULL TYPE LATCH MECHANISM FOR REMOVABLE SMALL FORM FACTOR
ELECTRONIC MODULES, Ser. No. 09/669,624 filed Sep. 25, 2000 by
Scott M. Branch, David P. Gaio, Michael F. Hanley and William K.
Hogan, all of which are incorporated herein in their entireties by
this reference.
FIELD OF THE INVENTION
This invention relates to the field of connecting cables or other
devices to computers and, more specifically, to the latching of
connectors and connections together to ensure reliable service and
uninterrupted data transmission and reception.
BACKGROUND OF THE INVENTION
Increasingly, computers and servers are being interconnected with
other computers and servers to form communications and data
networks. Prodigious amounts of data and other communications are
transmitted and received over such networks and require reliable
connection of coaxial or fiber-optic cables either to the
computer/server or to interface devices connected to the
computer/server to insure continued and uninterrupted connections.
In order to provide the services or data that a computer or server
is intended to provide to the remote computers upon demand,
networked computers or servers typically operate continuously,
twenty-four hours a day.
Easy connection/disconnection and reliable cable connections are
necessary to permit rapid, easy and reliable changing of cables as
needs arise. One approach, which is rapidly becoming a standard
within the industry, utilizes a transceiver module to receive
signals from the network cable and to transmit signals to the
computer or server, or vice-versa.
This type transceiver module may be designed in various versions,
but all are compatible with the particular connector and port in a
particular computer or server. Some transceivers can receive
optical signals and output electronic signals to the computer and
vice-versa. Other transceiver modules may be designed to receive
electronic signals from the network cables and output or transmit
computer compatible electronic signal and vice-versa. Transceiver
modules are inserted into and connected to the data ports of a
computer or server. The transceiver modules must be reliably
latched into data ports and be retained against reasonable forces
exerted on cables without being disconnected from the data ports.
At the same time, the latching of the transceiver modules must not
be so resistive to unintentional disconnection forces that the
transceiver module is damaged if the cables are pulled
excessively.
The latching devices preferably are disposed on the transceiver
modules so that these latching devices are removed from the host
device whenever the transceiver module is removed. Therefore, the
latch itself cannot be left in the data port, unprotected as such,
and face the possibility of breakage from impacts or forces exerted
thereon. Such breakage is a problem presented by designs wherein
the latch mechanism is not removed from the data port whenever a
transceiver module is removed. Remaining as part of the host
device, a latch release member is obviously exposed to damage as it
will project from the host device without a protective device to
shield the latch device.
The latch is designed and created to be an intentionally "weak
link" in the retention apparatus to desirably protect from
destructive forces, the more expensive components, such as a
transceiver module; those forces include those exerted by a person
tripping over the cables or pulling excessively hard on the
cables.
OBJECTS OF THE INVENTION
It is an object of the invention to latch a modular device into a
predetermined position or receptacle relative to a host device.
It is another object to the invention to enable a latch to hold the
latched device in a latched condition pending release of the
latching member from the modular device.
It is an additional object of the invention to effect latching of
the latch mechanism as a part of an inserting motion.
It is still another object of the invention to effect unlatching as
part of an extracting movement.
It is a still further object of the invention for the latch
mechanism to be easily replaceable on the device being latched to
the host device.
Other Objects of the Invention will become apparent from a complete
understanding of the structural and operational aspects of the
invention provided by the attached drawings and the Detailed
Description of the Invention below.
SUMMARY OF THE INVENTION
This Summary of the Invention is intended to present a succinct and
summary description of the invention and is not intended to be a
basis for limiting of the invention in any manner.
An electronic module is latched to the host device by a latch
spring with an inwardly turned end to engage a surface on the
electronic module and block movement of the electronic module,
thereby insuring that the electronic module remains inserted into
and electronically engaged with the electronics within the host
device. This connection allows the optical signals or other signals
of a network not only to be received, converted and utilized by the
host device but also to convert and transmit the signals of the
host device to a form usable on the network.
The latch is formed of a portion of an electro-magnetic
interference cage or shield or is fabricated of a resilient
cantilevered member with an end thereof formed to create a latch
portion extending substantially transverse to the axis of movement
of the electronic module and disposable in the path of transverse
surface, blocking movement of the electronic module in a
disconnecting direction. The cantilevered member in the form of a
beam spring may be separately formed and attached to some other
rigid structure in the host device.
The latch is controlled to deflect and to release the electronic
module for extraction or removal of the electronic module by a
latch release member. The latch release member is attached to and
carried by the electronic module in a manner that permits movement
relative to the electronic module. The latch release member is
preferably spring-biased to a retracted position which causes
disengagement from the latch member, permitting the latch member to
flex and restore to the effective, latching position.
The latch release member may be pulled in a natural removal or
extraction direction to cause camming surfaces on the latch release
member to engage and cam the latch member out of the path of the
latching surface on the electronic module and permit the pulling of
the latch release member to further pull the electronic module from
engagement with and within the host device.
The latch release member is dislocated against the force of a
restore spring arms extending from the body of the latch release
member and are arranged to abut against a juxtaposed surface to
better provide the extraction or removal force to the electronic
module.
The invention permits release and removal of the electronic module
from the host device and is accomplished by a natural pulling
motion necessary to extract the electronic module.
The invention may be implemented into any type of module that must
be latched into a host and must be removed from time to time.
A more complete understanding of the structure and operation of the
latching mechanism of the invention may be gained from the attached
drawings and the detailed description of the invention that
follows.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of an electronic module carrying the latch
mechanism of the invention disposed relative to a latch bar.
FIG. 2 is an isometric view of a portion of an electronic module
and the latch release mechanism carried thereby.
FIG. 3 is an isometric view of the exposed surface of the latch
release member.
FIG. 4 is an isometric view of the latch release member from the
external grip end thereof.
FIG. 5 is an isometric view of the external end of the transceiver
module and the grip end of the latch release member of the latch
mechanism of the invention.
FIG. 6 is an isometric view of the host device and, particularly,
the electro-magnetic interference shield and the latch member of
the latch mechanism.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
OF THE BEST MODE FOR CARRYING OUT THE INVENTION
AS CONTEMPLATED BY THE INVENTORS
Referring to FIG. 1, the pull-to-release latch release member pull
tab 34 is shown protruding from the transceiver module 10 and
illustrates the transceiver module 10 latched into place by the
latch member 16. The transceiver module 10 is shown inserted within
the electro-magnetic interference shield or cage 18. A portion of
the electro-magnetic interference cage 18 is formed both to be a
cantilevered beam spring, functioning as latch member 16, and to
deflect to permit passage of the transceiver module 10 upon
insertion into the electro-magnetic interference cage 18.
Edge 21 of the upstanding portion or finger 20 of latch member 16
engages the transceiver module 10 to latch or retain the
transceiver module 10 in the electro-magnetic interference cage 18
and is connected to the electronics (not shown) contained within
the housing of the host device 14.
The transceiver module 10 is illustrated mated with a ferrule 60 on
the end of a fiber optic cable 62. The fiber optic cable ferrule 60
is positioned above the pull-to-release latch member 34 to prevent
ready access to the release member 34 while the fiber optic cable
62 is connected to the transceiver module 10 and presumably
conveying optical signals to and from the transceiver module
10.
Latch member or retention member 16 engaged with the transceiver
module 10 resists the unintentional disengagement of the
transceiver module 10 from the host device 14 and the unintentional
withdrawal of the transceiver module 10 through the bezel 12 of
host device 14. Latch member 16 has an upstanding portion 20 which
projects transverse to the path of movement of transceiver module
10 during insertion into and extraction from host device 14. The
upstanding portion 20 of latch member 16 will engage the latch
surface 32 formed into the transceiver module 10 to retain and
prevent extraction of the transceiver module 10.
FIG. 2 illustrates the pull-to-release member 34 extending from the
exposed end of the transceiver module 10 and the arrow indicates
the direction of movement of the latch release member 26 for
accomplishing the release of the latched condition retaining the
transceiver module 10, whenever the module 10 is inserted into the
electro-magnetic interference cage 18 discussed above with
reference to FIG. 1.
The transceiver module 10 is provided with slides 38 both to retain
the latch release body 28 and to guide its movement thereof along a
path parallel to the longitudinal axis of the transceiver module
10; this also permits movement of the latch release body 28
parallel to the axis of insertion and withdrawal of the transceiver
module 10 into and out of the electromagnetic interference cage 18,
shown in FIG. 1.
The underside of the pull-to-release member 26 is illustrated in
FIG. 3. The latch release member 26 has a longitudinal body 28, a
pull tab 34 on an exposed end and a spring member or spring arms 44
formed into the opposite end of the longitudinal body 28. The pull
tab 34 is formed to permit engagement of its top surface 35 and
bottom surface 37 thereof by the thumb and forefinger of a human
hand. As illustrated in FIG. 1, the surfaces 35, 37 may be any of
several different types such as smooth, ridged, textured, checkered
or other suitable non-slip engageable surface textures to resist
slippage of the thumb and forefinger, thereby insuring a good
pulling grasp to unlatch the transceiver module 10 from the latch
member 16 of the electro-magnetic interference cage 18 within the
host device 14.
Again referring to FIGS. 2 and 3, the latch release member 26 is
provided with recesses or cavities 30 in the exposed underside
thereof. These recesses 30 are preferably disposed on opposing
edges of the exposed side or under surface of the latch release
member 26. This permits the reception into the recesses 30 of
portions 20 of the latch member 16 extending from the
electro-magnetic interference cage 18 as described earlier with
reference to FIG. 1.
The distal end surface 48 of the recess 30 is formed to create
sloping cam or ramp surfaces 48. The camming surfaces 48 may be
engaged with the extending portions or fingers 20 of the latch
member 16 that are resident within recesses 30 by a withdrawing
movement of the latch release member 26. The camming surfaces 48
act to progressively force the fingers 20 of the latch member 16
out of the recesses 30 and out of interference with the latch
surface 32 of the transceiver module 10 whenever the latch release
member 26 is translated longitudinally relative to the transceiver
module 10.
The fingers 20 are progressively displaced out of engagement with
the transceiver module 10 and the spring arms 44 on the distal end
of the longitudinal body 28 of the latch release member 26 are
caused to flex at the flexure section 50 and act as springs. The
spring arms 44 act to return and retain the latch release member 26
in its withdrawn or retracted position relative to the transceiver
module 10 (FIG. 1) whenever there are no external forces exerted on
the pull tab 34 of the latch release member body 28.
With the latch release member 26 fully retracted, the latch member
16 and, particularly, fingers 20 thereof are free to enter into the
recesses 30 and dispose the fingers 20 of latch member 16 in
blocking interference with the transceiver module 10, thereby
preventing withdrawal of the transceiver module 10 from the
electro-magnetic interference cage 18 and its connection with the
host device 14.
Upon release of pulling forces on pull tab 34, latch release member
26 will be restored, due to the inherent resilience of spring arms
44, to its retracted position upon release of pulling forces on the
tab 34.
Additionally, as best seen in FIG. 2, with the spring arms 44
resident in the slot-like recess 52 in the bottom of the
transceiver module 10, and when the spring arms 44 deflect in
response to the movement of the latch release member 26, the
surfaces 46 of the spring arm members 44 and the surfaces 54 of the
recess 52 engage and abut to limit travel of the latch release
member 26. In addition to this limiting of longitudinal travel, the
engagement of the spring finger surfaces 46 (shown in FIGS. 2, 3,
and 4) and the transceiver module surfaces 54, in FIG. 2, provides
a substantial resistance to further deflection of the spring arms
44. Consequently, such engagement both transfers substantially all
of the force exerted on the pull tab 34 to the transceiver module
10 and also provides a very substantial force for extracting the
transceiver module 10 from both the electro-magnetic interference
cage 18 and those retaining frictional forces exerted on the
transceiver module electronic connector (not shown).
The latch release member 26 is illustrated in detail in FIGS. 3 and
4. The latch release member 26 is provided with slide members 40.
The slide members 40 guide and stabilize the latch release member
26 during movement of the latch release member 26 relative to the
transceiver module 10. As can be observed in FIG. 2, the form of
the slide members 40, being wedge-shaped projections from the latch
release member body 28, permits easy insertion of the latch release
member 26 into the slide channel 42 formed by the transceiver
module 10.
Typically, the slide channel 42 is formed into the transceiver
module 10 as a part of the molding operation which results in the
transceiver module 10 and provides the retention function necessary
for the relative movement of the latch release member 26 and the
transceiver module 10. The recess or cavity 52 that accepts the
spring arms 44 likewise is molded into the transceiver module
10.
As shown in FIGS. 3 and 4, the latch release member 26 is assembled
to the transceiver module 10 by forcing the body 28 of the latch
release member 26 between the slides 38 that form a portion of the
slide channel 42 of transceiver module 10, spreading the slides 38
and forcing the wedge-shaped slides 40 on the sides of the latch
release member body 28 until the slides 40 pass over the slides 38,
and the slides 38 snap back to shape. Similarly, a broken or
damaged latch release member 26 may be removed by spreading the
slides 38 and removing the broken or defective latch release member
26 between the slides 38. Thereafter, a new latch release member 26
may be inserted as previously described, and the significantly more
expensive transceiver module 10 may be returned to service by the
operator or other relatively unskilled person without the
assistance of a technician and the cost of a service call.
FIG. 5 shows the pull tab 34 of the latch release member body 28
protruding from below transceiver module 10. This arrangements
protects pull tab 34 and latch release member body 28 any time
fiber optic cable 62 and ferrule 60 are connected to the
transceiver module 10, as in FIG. 1.
The operation of the latching mechanism of the invention involves
the insertion of the transceiver module 10 into the host device 14,
typically by inserting the transceiver module 10 into the
electro-magnetic interference cage 18 and seating the transceiver
module 10. Referring to FIG. 6, the host device 14, typically a
computer or server, provides the latch member 16 for engagement
with the latch release member 26, preferably in the form of a
portion of the metal electro-magnetic interference cage 18 or other
deflectable member in the form of a cantilevered beam spring 16.
The latching portion 20 of the spring or latch member 16, extending
inwardly toward the transceiver module 10, slides relative to the
transceiver module 10 until passing the latch surface 32 of the
transceiver module 10. Thereafter, the latch member 16 relaxes and
flexes to dispose at least a portion 20 of the latch member 16 in a
position to block or interfere with the withdrawal of the
transceiver module 10. The latch member 16 extends into the
recesses 30 on the body 28 of the latch release member 26. These
actions are best seen in FIGS. 1 and 2.
With the transceiver module 10 being latched into position by
engagement of portion 20 of latch member 16 with the latch surface
32 and the latch release member 26 fully retracted into the
transceiver module 10, the latch member 16, particularly, portion
20 is resident in the recesses 30 in the latch release member
26.
Removal of the transceiver module 10 is accomplished by grasping
and pulling the pull tab 34 of the latch release member 26.
Whenever the latch release member 26 is translated generally left
to right as occurs in FIG. 2, the sloping surfaces 48 engage the
edge 21 of portion 20 of the latch member 16 and cause the
deflection of the cantilevered beam spring 16 forming the support
for the latch surface 22 on portion 20 of the latch member 16. Upon
the deflection to the greatest extent possible by the sloped
camming surfaces 48, the latch member 16 is disengaged from latch
surface 32 and the transceiver module 10 may be extracted from the
host device 14 by further pulling pull tab 34.
The spring arms 44 will flex relative to the transceiver module 10
to provide a restore movement for the latch release member 26. Once
the latch release member 26 is fully translated for extraction, the
spring arms 44 will engage a blocking surface 54 of recess 52; such
engagement not only will prevent further movement of the latch
release member 26 relative to the transceiver module 10 but also
will transmit a force exerted on the latch release member 26 to
transceiver module 10 to pull the transceiver module 10 from the
host device 14 and disconnect the electronic connectors on both the
transceiver module 10 and the host device 14.
The spring arms 44 and, particularly, the flexure regions 50 of the
spring arms 44 may be sized to break away from the latch release
member 26 if an excessive force is applied to the pull tab 34. This
feature insures a weak link in a relatively inexpensive part that
can be easily replaced if latch release member 26 is broken or
defective.
FIG. 6 shows a portion of the host device 14 where the
electro-magnetic interference cage 18 is mounted on a circuit board
24 within the host device or computer 14; the bottom portion of the
electromagnetic interference cage 18 is partially severed
longitudinally to form the latch member 16 with the upstanding
portions 20 projecting toward or into the space that would be
occupied by the transceiver module 10. The latch surface 22 of the
latch 16 is the back side surface of the upstanding portions
20.
The latch member need not be a leaf spring as illustrated if a
reciprocal latch member is desired. The same latching function
could be attained by a spring-biased member supported by the bezel
or housing of the host device. The spring-biased member could be a
reciprocally moveable latch member biased by a separate spring and
guided by a structure mounted on the interior of the housing.
Other modifications of various aspects of the invention may become
apparent to one of skill in the art.
While the description of the invention has been made with reference
to a transceiver module for purposes of the preferred embodiment,
other electronic modules or devices may be latched by the use of
this design of latch mechanism.
Each element of the invention is described with reference to at
least one figure of the drawings and it should be understood that
description is applicable to the same element in any figure,
notwithstanding a lack of specific reference to the element in a
particular figure.
The detailed description has been made for purposes of disclosure
and may not be used to limit in any manner the scope of protection
afforded by the attached claims which define the scope of the
invention.
This description is made of the preferred embodiment of the
invention but other embodiments of and modifications and changes to
the described invention will come to mind of one skilled in the
art, and the modifications and changes do not remove the resulting
article from the scope of protection afforded the invention by the
attached claims.
* * * * *